Three-component intumescent flame retardant

Details Three-component intumescent flame retardant Three-component intumescent flame retardant

1991-09-05

1993-04-20

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524140, 524416, 524492, C08J 510, C08K 534, C08L 2300

Patent

active

052043932

ABSTRACT:
An improved flame retardant polyolefin is disclosed which comprises a combination of ammonium polyphosphate; tris(2-hydroxyethyl) isocyanurate; and melamine cyanurate; and a selected silica in an amount from 0.5 percent to an amount equal to one-half the amount by weight of THEIC, wherein the selected silica meets defined surface area, particle size and absorption criteria.

REFERENCES:
patent: 3671487 (1972-06-01), Abolins
patent: 3810086 (1974-05-01), Mathis et al.
patent: 3936416 (1976-02-01), Brady
patent: 4107232 (1978-08-01), Haaf et al.
patent: 4198328 (1980-04-01), Bertelli et al.
patent: 4198493 (1980-04-01), Marciandi
patent: 4344878 (1982-08-01), Dolce
patent: 4490504 (1984-12-01), Mark
patent: 4727102 (1988-02-01), Scarso
patent: 4997876 (1991-03-01), Scarso
The Chemistry and Uses of Flame Retardants, J. Lyons, (Wylie-Interscience, New York, New York, 1970) pp. 256-280.
"Intumescent Coating Systems, Their Development and Chemistry", H. L. Vandersall, J. Fire & Flammability, vol. 2, pp. 97-140, (Apr. 1971).
Underwriters' Laboratory Procedure entitled, "Test for Flammability of Plastic Material-UL94".
American Society for Testing Materials ANSI/ASTM D 2863-77, entitled, "Standard Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)", published Sep. 1977 (D 2863).

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